{"type": "FeatureCollection", "features": [{"id": "10.1007/s11104-017-3369-8", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-22T16:15:07Z", "type": "Journal Article", "created": "2017-08-22", "title": "Thaw Pond Development And Initial Vegetation Succession In Experimental Plots At A Siberian Lowland Tundra Site", "description": "<p>Background and aims: Permafrost degradation has the potential to change the Arctic tundra landscape. We observed rapid local thawing of ice-rich permafrost resulting in thaw pond formation, which was triggered by removal of the shrub cover in a field experiment. This study aimed to examine the rate of permafrost thaw and the initial vegetation succession after the permafrost collapse. Methods: In the experiment, we measured changes in soil thaw depth, plant species cover and soil subsidence over nine years (2007\u20132015). Results: After abrupt initial thaw, soil subsidence in the removal plots continued indicating further thawing of permafrost albeit at a much slower pace: 1 cm y<sup>\u22121</sup> over 2012\u20132015 vs. 5 cm y<sup>\u22121</sup> over 2007\u20132012. Grass cover strongly increased after the initial shrub removal, but later declined with ponding of water in the subsiding removal plots. Sedges established and expanded in the wetter removal plots. Thereby, the removal plots have become increasingly similar to nearby \u2018natural\u2019 thaw ponds. Conclusions: The nine years of field observations in a unique shrub removal experiment at a Siberian tundra site document possible trajectories of small-scale permafrost collapse and the initial stage of vegetation recovery, which is essential knowledge for assessing future tundra landscape changes.</p>", "keywords": ["0301 basic medicine", "Ecology (including Biodiversity Conservation)", "Permafrost degradation", "Betula nana", "15. Life on land", "01 natural sciences", "Thermokarst", "Vegetation dynamics", "03 medical and health sciences", "13. Climate action", "Arctic tundra", "Environmental Sciences", "SDG 15 - Life on Land", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1007/s11104-017-3369-8"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%20and%20Soil", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11104-017-3369-8", "name": "item", "description": "10.1007/s11104-017-3369-8", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11104-017-3369-8"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-08-22T00:00:00Z"}}, {"id": "10.1016/j.envexpbot.2021.104387", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-09-22T16:15:47Z", "type": "Journal Article", "created": "2021-01-13", "title": "Volatile organic compound emission in tundra shrubs \u2013 Dependence on species characteristics and the near-surface environment", "description": "Temperature is one of the key abiotic factors during the life of plants, especially in the Arctic region which is currently experiencing rapid climate change. We evaluated plant traits and environmental variables determining leaf temperature in tundra shrubs and volatile organic compound (VOC) emissions with field measurements on deciduous tundra shrubs, Salix myrsinites and Betula nana, and evergreen Cassiope tetragona and Rhododendron lapponicum. Higher leaf-to-air temperature difference was observed in evergreen, compared to deciduous shrubs. Evergreen shrubs also showed continuously increasing photosynthesis with increasing temperature, suggesting high thermal tolerance. For the deciduous species, the optimum temperature for net photosynthesis was between our measurement temperatures of 24\u2009\u00b0C and 38\u2009\u00b0C. Air temperature and vapor pressure deficit were the most important variables influencing leaf temperature and VOC emissions in all the studied plants, along with stomatal density and specific leaf area in the deciduous shrubs. Using climate data and emission factors from our measurements, we modelled total seasonal tundra shrub VOC emissions of 0.3-2.3\u2009g\u2009m-2 over the main growing season. Our results showed higher-than-expected temperature optima for photosynthesis and VOC emission and demonstrated the relative importance of plant traits and local environments in determining leaf temperature and VOC emissions in a subarctic tundra.", "keywords": ["0106 biological sciences", "0301 basic medicine", "VOC", "Betula nana", "15. Life on land", "Salix myrsinites", "01 natural sciences", "Cassiope tetragona", "Article", "Leaf temperature", "03 medical and health sciences", "13. Climate action", "11. Sustainability", "MEGAN", "Photosynthesis", "Rhododendron lapponicum", "Tundra"]}, "links": [{"href": "https://doi.org/10.1016/j.envexpbot.2021.104387"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20and%20Experimental%20Botany", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.envexpbot.2021.104387", "name": "item", "description": "10.1016/j.envexpbot.2021.104387", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.envexpbot.2021.104387"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-04-01T00:00:00Z"}}, {"id": "10.5061/dryad.8382j4r", "type": "Feature", "geometry": null, "properties": {"license": "unspecified", "updated": "2026-09-22T16:19:44Z", "type": "Dataset", "title": "Data from: Spatial variation and linkages of soil and vegetation in the Siberian Arctic tundra \u2013 coupling field observations with remote sensing data", "description": "unspecifiedPlant, soil and remote  sensing attributes of a Siberian Arctic sitePlant and soil data of  study plots were collected in the field in summer 2014. NDVI and  topographical attributes were later extracted from three satellite images,  portraying the field site and vegetation in three different years at 180,  220 and 750 DD (growing degree days with 0 C threshold). Plant species  presence (1 in data) and absence (0 in data) in study plots is available  for dicotyledonous vascular plants. Land cover types are based on  ground-based visual judgement.Mikola et al.  2018_Biogeosciences.xlsx", "keywords": ["Vascular plant", "Satellite image", "soil temperature", "reflectance", "Permafrost", "spatial variation", "Spatial extrapolation", "Salix", "15. Life on land", "Betula nana", "moss", "Ecosystem carbon exchange", "LAI", "Sphagnum", "Carex", "Eriophorum", "13. Climate action", "Land cover type"], "contacts": [{"organization": "Mikola, Juha, Virtanen, Tarmo, Linkosalmi, Maiju, V\u00e4h\u00e4, Emmi, Nyman, Johanna, Postanogova, Olga, R\u00e4s\u00e4nen, Aleksi, Kotze, D. Johan, Laurila, Tuomas, Juutinen, Sari, Kondratyev, Vladimir, Aurela, Mika,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5061/dryad.8382j4r"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.8382j4r", "name": "item", "description": "10.5061/dryad.8382j4r", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.8382j4r"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-05-04T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Betula+nana&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Betula+nana&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Betula+nana&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Betula+nana&offset=3", "hreflang": "en-US"}], "numberMatched": 3, "numberReturned": 3, "distributedFeatures": [], "timeStamp": "2026-09-22T18:53:43.025768Z"}